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Inverse-positive interval matrices. (English) Zbl 0628.65027
Several necessary and sufficient conditions are given for inverse positivity of an interval matrix $$(A^{-1}\geq 0$$ for each $$A\in A^ I)$$. An iterative scheme for solving systems of linear interval equations with inverse positive matrices is presented.

MSC:
 65F10 Iterative numerical methods for linear systems 65G30 Interval and finite arithmetic 15B48 Positive matrices and their generalizations; cones of matrices